Pallet transportation assembly and processes of transporting pallets using the same

ABSTRACT

The present invention relates to a pallet transportation assembly comprising a first and second tine, each having a top, a bottom, a front wheel, a middle wheel, a rear wheel, and a riser; and a body coupled to the first and second tines comprising a tine adjustment system and a vertical backing portion.

This application is a continuation of U.S. patent application Ser. No.14/475,981, filed Sep. 3, 2014, which is a continuation-in-part of U.S.patent application Ser. No. 13/404,797, filed Feb. 24, 2012, now U.S.Pat. No. 9,260,125, issued Feb. 16, 2016, the contents of bothincorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a pallet transportation assemblycomprising a first and second tine, each having a top, a bottom, a frontwheel, a middle wheel, a rear wheel, and a riser; and a body coupled tothe first and second tines comprising a tine adjustment system and avertical backing portion.

2. Background Art

Manually operated pallet jacks include mechanical devices used primarilyfor interior applications in such locations as warehouses and somelarger consumer stores. The term “manually” refers to the means formoving and operating the pallets jacks: typically, they use hydraulic,pneumatic or electric lifting mechanisms that an operator enables tolift goods. Pallet jacks typically have two or more tines, that areplaced under a pallet, upon which is stored the goods to be moved. Inthe U.S., loaded pallets are typically about 4 feet long by 4 feet wide,and can be between a couple of inches to as much as 8-10 feet in height.The major considerations in the maximum height are the weight to belifted and the center of gravity.

Other types of pallet jacks include those that are completely orsemi-automated. These pallet jacks can include an internal combustionengine or motor, or an electric or propane operated motor that drivesthe pallet jack according to mechanical inputs received from theoperator. Some of these pallet jacks can place goods on pallet severalstories in height (20′-40′).

As briefly discussed above, pallet jacks are usually operated in theinterior of buildings, on substantially smooth, pre-stressed concretefloors. These floors are extremely smooth and extremely strong. Palletjacks are generally designed to operate in such an interior environment,and usually have two small wheels located in the rear portion of thepallet jack, directly under the lifting mechanism. The tines are locatedoutwardly from the centrally located rear wheels, and the liftingmechanism is located directly over the centrally located rear wheels.Such known pallet jacks are generally useful for lifting heavily loadedpallets, wherein the pallets have a length (measured in the samedirection as the tines extend from the pallet jack) to width ratio ofabout 1.0 and less.

Pallets are used for receiving and handling heavy or bulky loads tofacilitate the stacking of several articles to comprise the load.Normally the load and pallet are shipped as a unit. A conventionalpallet is a wooden structure made up of several parallel, horizontalstringers and several cross boards, all nailed together to form arectangular element. In two-way pallets, the tines enter between thestringers and engage the cross boards from below. In a four-way pallet,the stringers are cut out in two areas each to provide inverted U-shapedopenings in what is known as the “four-way” side spaced apart to receivethe tines. A forklift may enter selectively, from any of the four sidesof the pallet, whereas in the two-way pallet entry can occur from onlytwo opposite sides.

All conventional pallets are not exactly alike, but are dimensioned soas to accommodate most fork-lifts. The entry openings are made wideenough to accommodate different tine spacing as well as to enable easyentry without precise maneuvering of the fork-lift. Nevertheless, it isnot possible for a pallet jack to unload or load a pallet from thefour-way side of a pallet because the inverted U-shaped openings of thepallet are not wide enough to accept the width of a pallet jack tine.

Due to these varying base configurations, certain pallets may require afirst pallet transportation assembly, while other pallets require asecond transportation assembly.

In a conventional pallet jack, the tines sit atop wheels. The tines maybe raised slightly to subsequently raise a pallet off the ground, whichtransfers the weight of the load from the pallet legs to the pallet jackwheels. In this position, the wheels support the tines and theaccompanying load and allow the load to be easily transported. The topsurfaces of the tines, however, are at a predetermined distance from thebottoms of the wheels and from the ground. This predetermined distanceallows for insertion into a conventional pallet. Other pallet designs,however, may have longer legs and, as such, may sit higher off theground than conventional pallets. Accordingly, the same predetermineddistance may not allow the tines to engage and raise such a pallet whilekeeping the pallet jack wheels on the ground. As a result, the weight ofthe load is not transferred from the pallet legs to the pallet jackwheels and the load cannot be effectively transported.

Also, when transporting up an incline, in taller pallet designs, thelegs of the pallet extend farther downward than a conventional pallet.As such, the legs come into contact with the incline, which may causethe pallets to dislodge from the pallet transportation assemblies and/orto topple.

Thus, a need exists for a pallet transportation assembly that cantransport pallets requiring more vertical clearance from the ground andare capable of transporting pallets having different baseconfigurations.

SUMMARY OF THE INVENTION

In some embodiments, the present invention is a pallet transportationassembly comprising a first and second tine, each having a top, abottom, a front wheel, a middle wheel, a rear wheel, and a riser; and abody coupled to the first and second tines comprising a tine adjustmentsystem and a vertical backing portion.

In some embodiments, the riser is located within a plane of the tine andis coupled to the tine adjustment system, wherein the tine adjustmentsystem is configured to move the riser in and out of the plane of thetine. In some embodiments, the tine adjustment system is furtherconfigured to adjust the elevation, pitch, yaw, length or combinationsthereof, of the first or second tine. In some embodiments, the tineadjustment system operates mechanically, pneumatically, electrically,hydraulically or combinations thereof.

In some embodiments the riser is configured to receive a baseconfiguration of a pallet.

In some embodiments, a pallet transportation assembly further comprisesa vertical backing portion comprises a lashing system having a strap,buckle and ratcheting mechanism. In some embodiments, the verticalbacking portion comprises an adjustable wall.

In some embodiments, the first and second tines are co-planar andparallel to each other.

In some embodiments, the front wheel and rear wheel have a first aspectratio and the middle wheel has a second aspect ratio, wherein the firstaspect ratio is less than the second aspect ratio. In some embodiments,the front and rear wheels are caster swivel wheels. In some embodiments,the middle wheel rotates about a fixed axle.

In some embodiments, the present invention is directed to a pallettransportation assembly comprising a first and second tine, each havinga top, a bottom, a front wheel, a middle wheel, a rear wheel and ariser; and a body coupled to the first and second tines comprising atine adjustment system; a wheel, and a vertical backing portion; whereinthe front wheel and rear wheel have a first aspect ratio and the middlewheel has a second aspect ratio greater than the first aspect ratio;wherein the front and rear wheels are caster swivel wheels and themiddle wheel rotates about a fixed axle.

In some embodiments, the present invention is directed to a process fortransporting a pallet having a base configuration, the processcomprising the step of providing a pallet transportation assemblycomprising a first and second tine, each having a top, a bottom, a frontwheel, a middle wheel, a rear wheel and a riser; and a body coupled tothe first and second tines comprising a tine adjustment system; a wheel,and a vertical backing portion; wherein the front wheel and rear wheelhave a first aspect ratio and the middle wheel has a second aspect ratiogreater than the first aspect ratio; wherein the front and rear wheelsare caster swivel wheels and the middle wheel rotates about a fixedaxle; adjusting each riser to accommodate the base configuration of thepallet; transporting the pallet; pivoting the pallet transportationassembly about the middle wheel; and adjusting the riser to disengagethe assembly from the pallet.

BRIEF DESCRIPTION OF DRAWINGS

The invention is described in detail below with reference to theappended drawings, wherein like numerals designate similar parts.

FIG. 1 shows a pallet transportation assembly in accordance with oneembodiment of the present invention.

FIG. 2 shows a riser in accordance with one embodiment of the presentinvention.

FIG. 3 shows a riser in accordance with one embodiment of the presentinvention.

FIG. 4 a pallet transportation assembly in accordance with oneembodiment of the present invention.

FIG. 5 a pallet transportation assembly in accordance with oneembodiment of the present invention.

FIG. 6 shows a pallet transportation assembly in accordance with oneembodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The various features of the embodiments will now be described withreference to the drawing figures, in which like parts are identifiedwith the same reference characters. The following description is not tobe taken in a limiting sense, but is provided merely for the purpose ofdescribing the general principles of the invention.

According to an embodiment of the present invention, a pallettransportation assembly is disclosed and described herein having anumber of significant advantages over conventional pallet transportationassemblies. According the embodiment depicted in FIG. 1, pallettransportation assembly comprises a first tine and a second tine eachhaving a top, a bottom, a front wheel, a middle wheel, a rear wheel, anda riser. A pallet transportation assembly of the present inventionfurther comprises a body having a tine adjustment system and a verticalbacking portion. In some embodiments, first tine is similar to secondtine, in that each are parallel to each other, of similar dimensions andconfiguration, and lie within the same horizontal plane. First andsecond tines are connected to body at their rear-most portion. The firstand second tine further comprises a front wheel, a middle wheel, and arear wheel.

In some embodiments, the front, middle and rear wheels are configured toprovide substantial stability and ease of operation when transportingloaded pallets, especially when such transport occurs on a substantiallyuneven or non-smooth terrain, as in a gravel parking lot, or one inwhich the pavement has cracks and/or potholes. In some embodiments, thefront, middle and rear wheels have an aspect ratio, defined as:

${{Aspect}\mspace{14mu} {Ratio}} = \frac{{Height}\mspace{14mu} {of}\mspace{14mu} {Wheel}}{{Width}\mspace{14mu} {of}\mspace{14mu} {Wheel}}$

Accordingly, in some embodiments of the present invention the front andrear wheels have a first aspect ratio and the middle wheel has a secondaspect ratio greater than the first aspect ratio.

In some embodiments, the aspect ratios for each wheel are selected toprovide the ability to negotiate substantially uneven or non-smoothterrain. Furthermore, because wheels are selected made of theappropriate material, which are not used on known pallet transportationassemblies, a pallet transportation assembly of the present inventionwill not scuff or scrape the floor of a convenience store or otherretail establishment. For example, according to one embodiment of thepresent invention, one or more wheels of the present invention are madewith a rubber compound. In other embodiments, one or more wheels of thepresent invention are made from semi-hard plastic.

As shown in FIG. 4, in some embodiments, the front and rear wheels arecaster swivel wheels, wherein the middle wheel rotates about a fixedaxle. As depicted in the FIG. 5 and FIG. 6, the wheel configuration ofthe assemblies of the present invention high maneuverability, includingthe capability of pivoting in a 360 degree manner about the middlewheels. Increased maneuverability is advantageous over conventionalassemblies because it allows the operator to negotiate a number of smallspaces, ultimately increasing the efficiency of pallet transport.

According to the embodiment depicted in FIG. 1, each tine comprises oneor more risers. In some embodiments, the riser is located in the planeof the tine and is coupled to the tine adjustment system. In someembodiment, the tine adjustment system is configured to move the riserin and out of the plane of the tine to engage a base configuration of apallet. In some embodiments the riser may comprise one or moreindependent points of contact. For example, as depicted in FIG. 1, theembodiment shown has four risers, located in the plane of the tines. Inother embodiments, the risers can be configured to be a singular piecealong a length of the tine. The riser of the present invention may beoperated simultaneously or independently from each other. In someembodiments the tine adjustment system is configured to simultaneouslymove each riser at the substantially the same speed and height. In someembodiments, the tine adjustment system is configured to move less thanall of the risers located in the plane of the tines.

A riser of the present invention is comprised of a material that is thesame as or different than the material from which the tine is made. Forexample, in some embodiments, a tine is made from a metal, e.g. steel,and riser is also made from steel. In other embodiments, tine 101 ismade from a metal, e.g. steel, and riser is made from a material softerthan steel, e.g. rubber. In some embodiments, the riser is made from amaterial that reduces damage to a pallet. Examples of materials fromwhich the riser can be made include, but are not limited to steel,aluminum, iron, rubber, polymeric materials, or combinations thereof.

A riser of the present invention may comprise various shapes orconfigurations in order to accommodate various base configurations ofthe pallet to be transported. For example, a riser of the presentinvention may comprise notches, staggered heights, platforms, tongue andgroove components, or combinations thereof. While not being bound by anyparticular theory, in some embodiments a riser having a configurationthat complements a base configuration of the pallet being transportedincreases the surface area shared between the riser and the pallet,thus, increasing the stability of the pallet being transported.

While not being bound to one particular theory, the riser of the presentinvention allows the assembly to interface with the pallet withoutaltering the assemblies contact with the ground. For example, in someembodiments, the pallet is lifted using the riser, wherein the assemblyremains in constant, unchanged contact with the ground. This allows forincreased stability and efficiency when transporting pallets.

In some embodiments, the body of the present invention further comprisesa tine adjustment system. In some embodiments, a tine adjustment systemis configured to manipulate a tine and/or a riser of the presentinvention. For example, a tine adjustment system of the presentinvention may be configured to perform a number of functions including,but not limited to, elevating the tines, lowering the tines, adjustingthe pitch of the tines, adjusting the yaw of the tines, adjusting theplane of the tines, adjusting the length of the tines or combinationsthereof. Tine adjustment systems are generally known to those of skillin the art and may include, but are not limited to, hydraulic systems,pneumatic systems, electrical systems, mechanical systems and the like,or combinations thereof. In some embodiments, the tine adjustment systemis configured to independently manipulate each tine and/or riser.

In some embodiments, a body for use in the present invention may furtherinclude one or more wheels. In some embodiments, the body wheel assiststhe operator of the pallet transportation assembly to maneuver theorientation of the pallet transportation assembly in space. In someembodiments, wheel 107 free pivots in a 360° manner. In someembodiments, the wheel is connected to a motor to provide drive to thepallet transportation assembly in order to facilitate the transportationof pallets using a pallet transportation assembly of the presentinvention.

In some embodiments, the pallet transportation assembly furthercomprises a vertical backing portion. In some embodiments, verticalbacking portion serves to provide vertical support to the goods carriedon the pallet to reduce the occurrence of toppling. In some embodiments,vertical backing portion further comprises a lashing system. In someembodiments, lashing system provides increased cargo stability bysecuring the cargo to the pallet transportation assembly of the presentinvention. Examples of lashing systems suitable for use with the presentinvention include, but are not limited to, strap and buckles, cords,ratcheting systems, and the like, or combinations thereof. In someembodiments, the lashing system comprises a strap, buckle, andratcheting mechanism.

In some embodiments, the vertical backing portion further comprises anadjustable wall. The adjustable wall provides additional cargo supportfor loads contained on pallets smaller than the length of the tines. Insome embodiments, the adjustable wall can engage the cargo, wherein theadjustable wall moves from a compartment located on the body. In someembodiments, the adjustable wall moves both laterally down the length ofthe tines or vertically in the plane of the vertical backing portion. Insome embodiments, the adjustable wall rotates about a fixed pointlocated in the vertical backing portion. In some embodiments, theadjustable wall further comprises a lashing system as described above.In some embodiments, the adjustable wall comprises notches or cavitieswhich may be used to assist in securing the cargo being transported.being transported on the pallet transportation assembly.

In some embodiments, the present invention is directed to a process fortransporting a pallet having a base configuration, the processcomprising the step of providing a pallet transportation assemblycomprising a first and second tine, each having a top, a bottom, a frontwheel, a middle wheel, a rear wheel and a riser; and a body coupled tothe first and second tines comprising a tine adjustment system; a wheel,and a vertical backing portion; wherein the front wheel and rear wheelhave a first aspect ratio and the middle wheel has a second aspect ratiogreater than the first aspect ratio; wherein the front and rear wheelsare caster swivel wheels and the middle wheel rotates about a fixedaxle; adjusting each riser to accommodate the base configuration of thepallet; transporting the pallet; pivoting the pallet transportationassembly about the middle wheel; and adjusting the riser to disengagethe assembly from the pallet.

While not being bound by any particular theory, the present inventiondramatically reduces the materials and resources needed to transportpallets between locations by providing a pallet transportation assemblythat is capable of transporting pallets having differing baseconfigurations. Another advantage of the present invention is theability to retrofit present pallet transportation assemblies with thefeatures of the present invention to increase their utility. Forexample, the pallet transportation assemblies described in U.S. PatentAppl. Pub. Nos. 2009/0185890, 2009/0183953, 2008/0149005, 2010/0196134,2010/0295261 and U.S. Pat. No. 8,011,677, which are incorporated byreference in their entirety herein, may be suitable candidates forretrofitting with the features of the presently claimed invention.

The present invention has been described with reference to certainexemplary embodiments thereof. However, it will be readily apparent tothose skilled in the art that it is possible to embody the invention inspecific forms other than those of the exemplary embodiments describedabove. This may be done without departing from the spirit and scope ofthe invention. The exemplary embodiments is are merely illustrative andshould not be considered restrictive in any way. The scope of theinvention is defined by the appended claims and their equivalents,rather than by the preceding description.

All United States patents and applications, foreign patents, andpublications discussed above are hereby incorporated herein by referencein their entireties.

We claim:
 1. A pallet transportation assembly comprising: a first andsecond tine, each having a top, a bottom, a front wheel, a middle wheel,a rear wheel, and a riser; and a body coupled to the first and secondtines comprising a tine adjustment system and a vertical backingportion.